AD5161BRMZ50-RL7

Overview

The AD5161BRMZ50-RL7 is a single-channel, 8-bit digital potentiometer from Analog Devices. It features a nominal end-to-end resistance of 50 kΩ with a ±30% tolerance and a temperature coefficient of 45 ppm/°C. The device offers 256 tap positions and operates on a single supply voltage ranging from 2.7 V to 5.5 V, consuming a typical supply current of 8 µA. It supports both SPI and I²C interfaces via a pin-selectable DIS input. Packaged in a compact 10-lead MSOP (3 mm × 4.9 mm) format, it includes power-on preset functionality that initializes the wiper to midscale.

Feature Summary

• Pin-selectable SPI or I²C compatible digital interface for flexible system integration
• 256-position resolution with linear taper and 50 kΩ nominal resistance
• Low power consumption with 8 µA typical supply current and shutdown mode
• Power-on preset to midscale position for safe initialization

Applications

• Mechanical potentiometer replacement in new designs
• Transducer adjustment for pressure, temperature, position, chemical, and optical sensors
• RF amplifier biasing circuits
• Gain control and offset adjustment in signal conditioning chains

Procurement Notes

Verify the specific suffix RL7 corresponds to the reel packaging configuration required for automated assembly. Confirm the BRMZ designation indicates the commercial temperature range and MSOP package variant. Ensure the DIS pin is correctly biased to select the intended communication protocol (SPI or I²C) during hardware design.

Selection Notes

Select this component when a single-channel digital potentiometer with 50 kΩ resistance is required. The 8-bit resolution provides 256 distinct steps suitable for precision adjustments. Consider the 45 ppm/°C temperature coefficient for thermal stability requirements. Verify that the 2.7 V to 5.5 V supply range aligns with the system power rails.

Part Context

This part belongs to the AD5161 family of 256-position digital potentiometers. The 'B' suffix typically denotes the commercial temperature grade, while 'RMZ' specifies the 10-lead MSOP package. The '50' indicates the 50 kΩ resistance value, and 'RL7' identifies the tape and reel packaging option for high-volume manufacturing.

Replacement Considerations

Direct replacements within the same family include other resistance variants such as AD5161BRMZ10 (10 kΩ), AD5161BRMZ5 (5 kΩ), or AD5161BRMZ100 (100 kΩ). These parts share identical pinouts and interface protocols but differ in nominal resistance values.